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(No Model.)

. 4 Sheets-Sheet 1. S. H. SHORT. MACHINERY FOR PROPELLING ELECTRIC CARS.

Patented May 12, 1891.

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s. H. SHORT. MACHINERY FOR PROPELLING ELECTRIC CARS. No. 452,036. PatentedMay 12, 1891.

(No Model.)-

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S. H. SHORT. MAGHINEBY FOR PROPELLING ELECTRIC GARS.

No. 452,036. Patented May 12, 1891.

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- S. H. SHORT.

MACHINERY FOR PROPELLING ELECTRIC OARS. N0. 452,036. Patented May 12, 1891.

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-NITED ST TES ATENT OFFICE.

SIDNEY H. SHORT, OF CLEVELAND, OHIO, ASSIGNOR TO THE SHORT ELECTRIC RAILIVAY COMPANY, OF SAME PLACE.

MACHINERY FOR PROPELLING ELECTRIC CARS.

SPECIFICATION forming part of Letters Patent No. 452,036, dated May 12, 1891.

Application filed December 9, 1890.

To all whom, it may concern:

Be it known that I, SIDNEY H. SHORT, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Machinery for Propelling Electric Cars; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates more-particularly to machinery for propelling electric cars in which the armature of a propelling-motor or of each of the propelling-motors is geared to a driving-axle; buteach of the improvements constituting the invention is included for all the uses to which it may be adapted.

In accordance with the present invention a special holder is provided for motors, especially those which are supported, at least in part, by journal-bearings on a drivingaxle. This holder consists of a cross -bar mounted on springs on side bars belonging to the car-truck. A pivot connection is made between the motor-frame and the cross-bar, and to provide a further freedom of movement this pivotal connection is formed by a pin working in a horizontal slot. By means of this new or improved holder perfect freedom of movement is provided with a structure which can easily be made of suflicient strength for any ordinary requirements. The holder is included in the invention, in combination with a propelling-motor in general. It will be shown herein in connection with a geared motor having a pinion on the armature-shaft engaging a gear-wheel on the can axle; but it is also applicable to other forms of motorsas, for example, a motor geared to the car-axle through a counter shaft, as well known.

In accordance with another part of the present invention the motor-frame consists of yokes tied together by arms in one piece therewith and journaled on a car-axle, preferably by projections which carry the j ournal-bearings for the car-axle, so as to obtain minimum weight with appropriate strength. The projections are preferably in whole orin part in one piece with the yokes, so as to be made with the motor-frame; but the invenmultipolar field.

axle.

Serial No. 374,076. (No model) tion contemplates projections composed of separate pieces fastened to the yokes as well as projections integral with the same, or a motor-frame otherwise suitably journaled on a car-axle. The motor-frame may be insulated from the car-axle or journaled thereon without insulation. The magnets project from the yokes parallel with the armatureshaft, which is journaled in the yokes, or it may be in brackets attached thereto. Use maybe made of four magnets arranged on opposite sides of the armature, so as to form a two-pole field-magnet; but it is preferred to employ a larger number of magnets (eight, for example) arranged to form a multipolar field, (say one of four poles.) Such a multipolar motor has special advantage where there is no counter-shaft, as it enables the same torque to be obtained for the drivingaxle with less reducing gear. The armature would of course be adapted to use with the field-magnet, being, for example, cross-con nected at the commutator in the case of a The multipolar machine with field-magnets projecting from yokes at the sides of the armature parallel with the armature-axis has special advantages in carmotors in that it requires but little more space than a machine with a two-pole field.

In accordance with a further portion of the present invention what may be called a gear-box is provided on the motor-frame. It consists of a casing or covering around the gears. Preferably it is formed by a rim or a rim and a flange or plate cast onthe motorframe, together with a separable lid, and is made of such tightness that it may contain lubricant material for oiling the gears. The use of the gear-box is included generally in the invention for the gearing of car-motors; but it is specially designed for a pinion on the armature-shaft and a gear-wheel on a car= The gear and gear-box may be so made as to insulate the motor-frame from the caraxle.

In the accompanying drawings, which form part of this specification, Figures 1 and 2 are sections on line i and it of Fig. 3, and Fig. 3 is a partial transverse section on line iii of Fig. 1 of machinery for propelling electric cars constructed in accordance with the prescut invention, the motor being insulated from the oar-axle. Fig. lis a plan VlOW, partly in horizontal section, of similar machinery without insulation between the motor and the caraxles. Fig. 5 is a partial section on line a; of Fig. 4. Fig. 6 is a view similar to the last, but showing magnets for a two-pole field. Fig. 7 is a detail view, and Fig.8 is a view of a modified. form of the detail shown in Fig. 7.

The motor shown consists of an armature A, formed by winding an iron strip on itself and coiling an insulated wire around in notches in the edges of the ring formed by the wound-up strip. The tield-magnetsE project from the yokes F G on opposite sides of the armature A parallel with the armatureaxis. As shown in Figs. 1, 2, there are eight magnets E, which are arranged around the armature-axis to form a field with four poles, the magnets on opposite sides of the armat-urein line with each other being of like polarity. In themotor of Fig. 4 there are four magnets, forming a twopole field. It will be observed that the fourpole machine occupies butlittle, if any, more room than the two-pole, while at the same time exerting a pull of four poles instead of two on the armature. The yokes F and G are tied together by arms II and K, formed or cast integral therewith. The arm K is between the armature A and the car-axle O. The yokes F G have projections which are provided with journal-bearings 2 and 3 on the car-axle C.

In Figs. 1, 2, and 3 the projections are each in two parts G and G, the part G being integral with the yokes and the part G, which carries the journal-bearings, being bolted to the rest of the motor-frame with insulation B interposed. In Figs. etand 6 the projections F and G' are cast integral with the yokes F G. In all the arrangements shown the caraxle 0, therefore, constitutes a support for the motor, whose frame is journaled thereon.

The armatureshaft A (on which the armature A is keyed fast) is journaled in hearings in the yoke G, and the bracket L on the yoke F. The commutator D is fast on the said shaft A and for a multipolar field is suitably cross-connected, as well understood by those skilled in the art. The commutator-brushes Q and R are mounted on the bracket L at ninety degrees apart for a four-pole field.

The cross-bar S forms a holder for the 1110- tor. It rests at the ends on springs T of, say, soft vulcanized rubber. Of course a spring-mounting could be secured by other forms of springs. The use of rubber springs furnishes insulation also, which with other springs could be secured by additional insulating material. The springs or bufiers T rest upon the side bars U of the car-truck, which are supported by the journals of the car-axles in any known or suitable way, as, for example, by being secured to the pedestals or journal-boxes. As shown, each end of the cross-bar S is pivoted to a head lV,which 4, and 5,-

rests upon the top of the spring. There is a corresponding head \V on the opposite end of the spring, the two heads being bound together by one or more bolts X, which may be surrounded by an insulating-sleeve X, so as to insulate the bolts .from the head W. In the construction shown in Figs. 1 and 7 there is a bolt X on each side of the spring, and the head W is secured to the side bars U of the truck by a fork V. I11 Fig. 8 a single bolt X passes through the spring T.

The motor-frame F G H K is connected with the cross-bar S by means of a pin H, fast in the arm 11 and entering a horizontal slot S in the cross-bar S. This slot-and-pin connection permits great freedom of move ment to the propelling-motor with reference to the cross-bar S, and this, in connection with the yielding connection of the crossbars with the truck-bars U, allows the motor to move without liability of cramping.

The shaft A of the armature is provided with a pinion A, which engages the gearwheel 0, fast on the car-axle C. There is, therefore, as shown, only a single reduction of the speed of the motor. In Figs. 1 and 2 the gear-wheel C has a web of non-conduct ing material, such as wood, so that said gear does not establish an electrical connection between the motor-frame and the car-axle. On the yoke G and the corresponding projection is a gear-box Z, the body of which, as shown, is formed or cast (in whole orin part) integral with the motor-frame. The j ournalboxes in the projections G and the body of the gear-box are divided obliquely along the line 4 to facilitate their application to the car-axle O. The cover Z of the box could be divided on the same line, but, as shown, is divided on a nearly horizontal line. The box should be made not only dust-tight but lubri cant tight, so that it may contain lubricant to oil the gear-teeth. In Figs. 1, 2, and 3 the back of the box at Z is of non-conducting material, (as wood,) and is fastened to the yoke G, to a flange 5 of the box-rim, and to the part G Which forms the journal-bearing 2. The cover Z is also of non-conducting material. Thus the rim or part cast on the motor-frame is insulated from the caraXle C. In Figs. 4: and (5 the back and cover of the gear-box are of metal.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an electric-motor car, the combination of an electric-motor frame journaled at one end upon a car-axle, with a cross-bar elastically connected at each end with the truckframe, and a mechanical connection between the other end of the motor-frame and the middle of the cross bar, substantially as described. 1

2. In combination with a propelling-moto having a support 011 a car-axle by journalbearings and a truck-frame, a motor-holder comprising a cross-bar having yielding connection with the motor-frame in the middle and a yielding connectionalso with the truck frame at each end of said cross-bar, substantially as described.

3. In combination with a propelling-motor having a support on a car-axle by journalbearings and a truck-frame, a motor-holder comprising a cross-bar having a pivotal c011- nection withthe motor-frame in the middle, and springs or butters between the ends of the cross-bar and the truck-frame, substantially as described.

4. In combination with a propelling-motor having a support on a car-axle by j0urnalbearings and a truck-frame, a motor-holder comprising a cross-bar with slot-and-pin connection between itself and the motor-frame in the middle, and a spring or buffer at each end between the cross-bar and the truckframe, substantially as described. 5. In an electric-motor car, the combination of an electric-motor frame j ournaled at one end upon a car-axle with a cross-bar extending between the side bars of the truck-frame, heads, one for each end of the cross-bar, pivotally connected therewith, springs or buffers separating the heads and side bars, a bolt or bolts connecting the heads and side bars, and a connection between the cross-bar and the other end of the motor-frame, substantially as described.

6. The combination, with a car, of a motorframe comprising the yokes tied together and provided with projections, said frame being hung on a car-axle by journal-bearings in said projections, the armature, the field-magnets, the pinion on the armature-shaft, the gear on the car-axle engaged by said pinion, and the holderfor the motor-frame,comprisinga crossbar supported on the truck-frame by springs and pivotally connected with said motorframe, substantially as described.

7. In an electric-motor car, the combination of an electric-motor frame formed by the yokes of the field-magnets and the arms connecting the same with projections from the yokes provided with journal-bearings, whereby the motor-frame is hung upon a car-axle, a gear-box formed in part integral with one field-magnet yoke, an armature journaled in the yokes, and gearing connecting the armature and car-axle within the gear-box, substantially as described.

8. The combination of an electric car-motor journaled at one end to a car-axle, but insulated therefrom, with a cross-bar extending between the side bars of the truck-frame, elastically mounted on the samerand insulated therefrom, and a mechanical connection between the other end of the motor and the middle of the crossbar, substantially as described. I

9. The combination of an electric car-motor jonrnaled at one end to a car-axle, but insulated therefrom, and supported at the other end by a cross-bar insulated from the side bars of the truck-frame, with insulating-gearing connecting the armature of the motor with the car-axle, and an insulating gear-box surrounding the gearing, substantially as described. j

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

S. H. SHORT. Witnesses:

A. B. CALHOUN, G. J. LEEPHART. 

